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Method and system for improving seismic data resolution

A technology of seismic data and resolution, applied in seismology, seismic signal processing, geophysical measurement, etc., can solve problems such as the inability to effectively solve the problem of target layer resolution

Pending Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Application Information

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Problems solved by technology

Especially for complex seismic data, in the case of weak energy and thin reservoir, the above method cannot effectively solve the resolution problem of all target layers. How to compensate the attenuated energy of the formation and improve the resolution of seismic data is the focus of seismic data processing and difficulties

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  • Method and system for improving seismic data resolution
  • Method and system for improving seismic data resolution
  • Method and system for improving seismic data resolution

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Embodiment Construction

[0040] Such as figure 1 As shown, the present invention provides a method for improving the resolution of seismic data, which specifically includes steps:

[0041] S1. Preprocessing the seismic data to obtain the single-shot data after surface consistent amplitude compensation;

[0042] The waveform distortion of seismic records caused by the change of surface conditions can be regarded as a filtering effect, and this filtering effect is time-invariant. For a specific location on the ground, this effect is certain and has nothing to do with the seismic wave propagation path, which is the surface consistency characteristic.

[0043] Amplitude compensation is a commonly used method in the process of seismic data processing. It is used to compensate for the energy attenuation in the process of seismic propagation, and at the same time compensate for the energy inconsistency between shots and traces. Response to changes in underground lithology.

[0044] S2. Perform surface-con...

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Abstract

The invention provides a method and system for improving seismic data resolution, and the method comprises the steps: S1, carrying out the earth surface consistency deconvolution of single-shot data, and obtaining deconvolution data; s2, carrying out abnormal amplitude noise removal processing on the deconvolution data to obtain de-noised data; s3, performing inverse Q filtering processing on the de-noised data to obtain inverse Q filtering data; and S4, performing tuning deconvolution processing on the inverse Q filtering data. According to the method, earth surface consistency deconvolution, abnormal amplitude attenuation and inverse Q filtering are carried out on a preprocessed single shot, and finally series tuning deconvolution is carried out. Actual data processing shows that the purpose of improving the resolution step by step can be achieved through the process, and the imaging effect on the thin reservoir is good.

Description

technical field [0001] The invention relates to the field of seismic data processing, in particular to a method and system for improving the resolution of seismic data. Background technique [0002] During the downward propagation of seismic waves, due to the absorption and attenuation of the formation, the absorption and attenuation of energy and frequency will be caused. Since the high-frequency components attenuate faster than the lower-frequency components, the main frequency will decrease and the bandwidth will narrow, which will reduce the resolution of seismic data. lower. [0003] Existing methods for improving resolution include deconvolution: surface-consistent deconvolution, robust deconvolution, predictive deconvolution, wavelet deconvolution, tuned deconvolution, etc. Deconvolution is mainly used for Compressing wavelets, expanding frequency bands, and stabilizing waveforms are very important processing methods for improving resolution. The commonly used absor...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/36
CPCG01V1/36G01V1/368G01V2210/324
Inventor 刘晗冯永强张志立张靖王豆豆周创
Owner CHINA PETROLEUM & CHEM CORP